Counting Between Dates

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Hi, Syndicate_Admin 

Based on your information, I create a sample table:

Then create a new measure and try the following DAX expression:

Historical Assets = 
VAR MinYear = YEAR(MIN('Table'[Start Date]))
VAR MaxYear = YEAR(MAX('Table'[End Date]))
RETURN
SUMX(
    GENERATESERIES(MinYear, MaxYear, 1),
    VAR CurrentYear = [Value]
    RETURN
    CALCULATE(
        COUNTROWS('Table'),
        'Table'[Start Date] <= DATE(CurrentYear, 12, 31) &&
        'Table'[End Date] >= DATE(CurrentYear, 1, 1)
    )
)

Here is my preview:

How to Get Your Question Answered Quickly 

Best Regards

Yongkang Hua

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